What is the critical React Server vulnerability CVE-2025-55182?

CVE-2025-55182 is a critical flaw in React Server that allows attackers to execute malicious code on servers through unsafe deserialization.

How easy is it to exploit the React Server vulnerability?

Exploitation is very easy, requiring only a single unauthenticated HTTP request with near 100% reliability.

Which popular frameworks are affected by the React vulnerability?

Popular frameworks like Next.js, Vite RSC plugin, Parcel RSC plugin, and others that embed React Server Components are affected.

Home / Technology / Critical React Flaw: Hackers Exploit Servers with Ease

Critical React Flaw: Hackers Exploit Servers with Ease

4 Dec

•

Summary

A critical vulnerability in React Server allows remote code execution.
Exploitation is easy, requiring only a single unauthenticated HTTP request.
The flaw, rated a perfect 10, affects widely used web and cloud environments.

Critical React Flaw: Hackers Exploit Servers with Ease

A severe vulnerability with a maximum severity rating of 10 has been uncovered in React Server, an open-source package integral to many websites and cloud environments. This critical flaw, identified as CVE-2025-55182, enables attackers to execute malicious code on vulnerable servers with remarkable ease, requiring just a single unauthenticated HTTP request.

The exploit stems from unsafe deserialization within the Flight protocol of React Server Components. This allows specially crafted payloads to influence server-side logic, leading to privileged JavaScript code execution. Security firms Wiz and Aikido reported that the vulnerability has a near 100% success rate and affects the default configurations of popular frameworks like Next.js.

Due to the widespread adoption of React, particularly in cloud infrastructure, and the simplicity of exploitation, security professionals are urging immediate installation of the update released on Wednesday. Users of affected third-party components and frameworks are advised to consult their maintainers for specific guidance on patching and securing their systems.

Disclaimer: This story has been auto-aggregated and auto-summarised by a computer program. This story has not been edited or created by the Feedzop team.